Which of the following is true of the Glomar Challenger

A．It is a type of submarine.

B．It is an ongoing project.

C．It has gone on over 100 voyages.

D．It made its first DSDP voyage in 1968.

工程索赔按索赔的目的分有（）

A、机械设备索赔

B、工期索赔

C、费用索赔

D、人工索赔